ZIPPOR:

Father of Balak, King of Moab, who hired Balaam to curse Israel. All the passages which mention Zippor name him together with his son Balak (Num. xxii. 2, 4, 10, 16; xxiii. 18; Josh. xxiv. 9; Judges xi. 25). An allusion to him may be contained in "the former king of Moab" in Num. xxi. 26.